Yesterday was the birthday of renowned Abstract Expressionist painter Willem de Kooning. Today’s FRAME|WORK—a weekly blog series highlighting an artwork in the permanent collection—features de Kooning’s 1977 painting, Untitled XX, which is currently on view in Gallery 15 at the de Young Museum.

Matter + Spirit: The Sculpture of Stephen De Staebler, currently on view at the de Young, presents a retrospective of the artist’s work. This week’s
FRAME|
WORK draws attention to De Staebler’s mentor, Peter Voulkos. A renowned sculptor and teacher, Voulkos was hugely influential